2 * muxing functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "avio_internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
40 #include "audiointerleave.h"
49 * muxing functions for use within libavformat
52 /* fraction handling */
55 * f = val + (num / den) + 0.5.
57 * 'num' is normalized so that it is such as 0 <= num < den.
59 * @param f fractional number
60 * @param val integer value
61 * @param num must be >= 0
62 * @param den must be >= 1
64 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
77 * Fractional addition to f: f = f + (incr / f->den).
79 * @param f fractional number
80 * @param incr increment, can be positive or negative
82 static void frac_add(AVFrac *f, int64_t incr)
95 } else if (num >= den) {
102 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
109 for (j=2; j<14; j+= 1+(j>2))
110 while (q.den / q.num < min_precision && q.num % j == 0)
112 while (q.den / q.num < min_precision && q.den < (1<<24))
118 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
119 const char *format, const char *filename)
121 AVFormatContext *s = avformat_alloc_context();
130 oformat = av_guess_format(format, NULL, NULL);
132 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
133 ret = AVERROR(EINVAL);
137 oformat = av_guess_format(NULL, filename, NULL);
139 ret = AVERROR(EINVAL);
140 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
147 s->oformat = oformat;
148 if (s->oformat->priv_data_size > 0) {
149 s->priv_data = av_mallocz(s->oformat->priv_data_size);
152 if (s->oformat->priv_class) {
153 *(const AVClass**)s->priv_data= s->oformat->priv_class;
154 av_opt_set_defaults(s->priv_data);
160 av_strlcpy(s->filename, filename, sizeof(s->filename));
164 av_log(s, AV_LOG_ERROR, "Out of memory\n");
165 ret = AVERROR(ENOMEM);
167 avformat_free_context(s);
171 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
173 const AVCodecTag *avctag;
175 enum AVCodecID id = AV_CODEC_ID_NONE;
179 * Check that tag + id is in the table
180 * If neither is in the table -> OK
181 * If tag is in the table with another id -> FAIL
182 * If id is in the table with another tag -> FAIL unless strict < normal
184 for (n = 0; s->oformat->codec_tag[n]; n++) {
185 avctag = s->oformat->codec_tag[n];
186 while (avctag->id != AV_CODEC_ID_NONE) {
187 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
189 if (id == st->codec->codec_id)
192 if (avctag->id == st->codec->codec_id)
197 if (id != AV_CODEC_ID_NONE)
199 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
205 static int init_muxer(AVFormatContext *s, AVDictionary **options)
209 AVDictionary *tmp = NULL;
210 AVCodecContext *codec = NULL;
211 AVOutputFormat *of = s->oformat;
212 AVDictionaryEntry *e;
215 av_dict_copy(&tmp, *options, 0);
217 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
219 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
220 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
223 #if FF_API_LAVF_BITEXACT
224 if (s->nb_streams && s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)
225 s->flags |= AVFMT_FLAG_BITEXACT;
228 // some sanity checks
229 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
230 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
231 ret = AVERROR(EINVAL);
235 for (i = 0; i < s->nb_streams; i++) {
239 #if FF_API_LAVF_CODEC_TB
240 FF_DISABLE_DEPRECATION_WARNINGS
241 if (!st->time_base.num && codec->time_base.num) {
242 av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
243 "timebase hint to the muxer is deprecated. Set "
244 "AVStream.time_base instead.\n");
245 avpriv_set_pts_info(st, 64, codec->time_base.num, codec->time_base.den);
247 FF_ENABLE_DEPRECATION_WARNINGS
250 if (!st->time_base.num) {
251 /* fall back on the default timebase values */
252 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->sample_rate)
253 avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
255 avpriv_set_pts_info(st, 33, 1, 90000);
258 switch (codec->codec_type) {
259 case AVMEDIA_TYPE_AUDIO:
260 if (codec->sample_rate <= 0) {
261 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
262 ret = AVERROR(EINVAL);
265 if (!codec->block_align)
266 codec->block_align = codec->channels *
267 av_get_bits_per_sample(codec->codec_id) >> 3;
269 case AVMEDIA_TYPE_VIDEO:
270 if ((codec->width <= 0 || codec->height <= 0) &&
271 !(of->flags & AVFMT_NODIMENSIONS)) {
272 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
273 ret = AVERROR(EINVAL);
276 if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
277 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
279 if (st->sample_aspect_ratio.num != 0 &&
280 st->sample_aspect_ratio.den != 0 &&
281 codec->sample_aspect_ratio.num != 0 &&
282 codec->sample_aspect_ratio.den != 0) {
283 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
284 "(%d/%d) and encoder layer (%d/%d)\n",
285 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
286 codec->sample_aspect_ratio.num,
287 codec->sample_aspect_ratio.den);
288 ret = AVERROR(EINVAL);
296 if ( codec->codec_tag
297 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
298 && ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
299 || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
300 && !validate_codec_tag(s, st)) {
301 // the current rawvideo encoding system ends up setting
302 // the wrong codec_tag for avi/mov, we override it here
303 codec->codec_tag = 0;
305 if (codec->codec_tag) {
306 if (!validate_codec_tag(s, st)) {
307 char tagbuf[32], tagbuf2[32];
308 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
309 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
310 av_log(s, AV_LOG_ERROR,
311 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
312 tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
313 ret = AVERROR_INVALIDDATA;
317 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
320 if (of->flags & AVFMT_GLOBALHEADER &&
321 !(codec->flags & CODEC_FLAG_GLOBAL_HEADER))
322 av_log(s, AV_LOG_WARNING,
323 "Codec for stream %d does not use global headers "
324 "but container format requires global headers\n", i);
326 if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
327 s->internal->nb_interleaved_streams++;
330 if (!s->priv_data && of->priv_data_size > 0) {
331 s->priv_data = av_mallocz(of->priv_data_size);
333 ret = AVERROR(ENOMEM);
336 if (of->priv_class) {
337 *(const AVClass **)s->priv_data = of->priv_class;
338 av_opt_set_defaults(s->priv_data);
339 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
344 /* set muxer identification string */
345 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
346 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
348 av_dict_set(&s->metadata, "encoder", NULL, 0);
351 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
352 av_dict_set(&s->metadata, e->key, NULL, 0);
356 av_dict_free(options);
367 static int init_pts(AVFormatContext *s)
372 /* init PTS generation */
373 for (i = 0; i < s->nb_streams; i++) {
374 int64_t den = AV_NOPTS_VALUE;
377 switch (st->codec->codec_type) {
378 case AVMEDIA_TYPE_AUDIO:
379 den = (int64_t)st->time_base.num * st->codec->sample_rate;
381 case AVMEDIA_TYPE_VIDEO:
382 den = (int64_t)st->time_base.num * st->codec->time_base.den;
387 if (den != AV_NOPTS_VALUE) {
389 return AVERROR_INVALIDDATA;
391 frac_init(&st->pts, 0, 0, den);
398 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
402 if (ret = init_muxer(s, options))
405 if (s->oformat->write_header) {
406 ret = s->oformat->write_header(s);
407 if (ret >= 0 && s->pb && s->pb->error < 0)
411 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
415 if ((ret = init_pts(s)) < 0)
418 if (s->avoid_negative_ts < 0) {
419 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
420 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
421 s->avoid_negative_ts = 0;
423 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
429 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
431 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
432 it is only being used internally to this file as a consistency check.
433 The value is chosen to be very unlikely to appear on its own and to cause
434 immediate failure if used anywhere as a real size. */
435 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
438 //FIXME merge with compute_pkt_fields
439 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
441 int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
445 if (s->debug & FF_FDEBUG_TS)
446 av_log(s, AV_LOG_TRACE, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
447 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
449 if (pkt->duration < 0 && st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
450 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %d in stream %d\n",
451 pkt->duration, pkt->stream_index);
456 if (pkt->duration == 0) {
457 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
459 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
463 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
466 //XXX/FIXME this is a temporary hack until all encoders output pts
467 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
470 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
474 // pkt->pts= st->cur_dts;
475 pkt->pts = st->pts.val;
478 //calculate dts from pts
479 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
480 st->pts_buffer[0] = pkt->pts;
481 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
482 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
483 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
484 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
486 pkt->dts = st->pts_buffer[0];
489 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
490 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
491 st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE &&
492 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
493 av_log(s, AV_LOG_ERROR,
494 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
495 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
496 return AVERROR(EINVAL);
498 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
499 av_log(s, AV_LOG_ERROR,
500 "pts (%s) < dts (%s) in stream %d\n",
501 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
503 return AVERROR(EINVAL);
506 if (s->debug & FF_FDEBUG_TS)
507 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
508 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
510 st->cur_dts = pkt->dts;
511 st->pts.val = pkt->dts;
514 switch (st->codec->codec_type) {
515 case AVMEDIA_TYPE_AUDIO:
516 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
517 ((AVFrame *)pkt->data)->nb_samples :
518 av_get_audio_frame_duration(st->codec, pkt->size);
520 /* HACK/FIXME, we skip the initial 0 size packets as they are most
521 * likely equal to the encoder delay, but it would be better if we
522 * had the real timestamps from the encoder */
523 if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
524 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
527 case AVMEDIA_TYPE_VIDEO:
528 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
535 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
538 * FIXME: this function should NEVER get undefined pts/dts beside when the
539 * AVFMT_NOTIMESTAMPS is set.
540 * Those additional safety checks should be dropped once the correct checks
541 * are set in the callers.
543 static int write_packet(AVFormatContext *s, AVPacket *pkt)
547 if (s->output_ts_offset) {
548 AVStream *st = s->streams[pkt->stream_index];
549 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
551 if (pkt->dts != AV_NOPTS_VALUE)
553 if (pkt->pts != AV_NOPTS_VALUE)
557 if (s->avoid_negative_ts > 0) {
558 AVStream *st = s->streams[pkt->stream_index];
559 int64_t offset = st->mux_ts_offset;
560 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
562 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
563 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
564 s->internal->offset = -ts;
565 s->internal->offset_timebase = st->time_base;
568 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
569 offset = st->mux_ts_offset =
570 av_rescale_q_rnd(s->internal->offset,
571 s->internal->offset_timebase,
576 if (pkt->dts != AV_NOPTS_VALUE)
578 if (pkt->pts != AV_NOPTS_VALUE)
581 if (s->internal->avoid_negative_ts_use_pts) {
582 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
583 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
584 "pts %s in stream %d.\n"
585 "Try -avoid_negative_ts 1 as a possible workaround.\n",
591 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
592 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
593 av_log(s, AV_LOG_WARNING,
594 "Packets poorly interleaved, failed to avoid negative "
595 "timestamp %s in stream %d.\n"
596 "Try -max_interleave_delta 0 as a possible workaround.\n",
604 did_split = av_packet_split_side_data(pkt);
605 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
606 AVFrame *frame = (AVFrame *)pkt->data;
607 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
608 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
609 av_frame_free(&frame);
611 ret = s->oformat->write_packet(s, pkt);
614 if (s->flush_packets && s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
618 av_packet_merge_side_data(pkt);
623 static int check_packet(AVFormatContext *s, AVPacket *pkt)
628 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
629 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
631 return AVERROR(EINVAL);
634 if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
635 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
636 return AVERROR(EINVAL);
642 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
646 ret = check_packet(s, pkt);
651 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
652 ret = s->oformat->write_packet(s, NULL);
653 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
655 if (ret >= 0 && s->pb && s->pb->error < 0)
662 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
664 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
667 ret = write_packet(s, pkt);
668 if (ret >= 0 && s->pb && s->pb->error < 0)
672 s->streams[pkt->stream_index]->nb_frames++;
676 #define CHUNK_START 0x1000
678 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
679 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
682 AVPacketList **next_point, *this_pktl;
683 AVStream *st = s->streams[pkt->stream_index];
684 int chunked = s->max_chunk_size || s->max_chunk_duration;
686 this_pktl = av_mallocz(sizeof(AVPacketList));
688 return AVERROR(ENOMEM);
689 this_pktl->pkt = *pkt;
690 #if FF_API_DESTRUCT_PACKET
691 FF_DISABLE_DEPRECATION_WARNINGS
692 pkt->destruct = NULL; // do not free original but only the copy
693 FF_ENABLE_DEPRECATION_WARNINGS
696 pkt->side_data = NULL;
697 pkt->side_data_elems = 0;
698 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
699 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
700 av_assert0(((AVFrame *)pkt->data)->buf);
702 // Duplicate the packet if it uses non-allocated memory
703 if ((ret = av_dup_packet(&this_pktl->pkt)) < 0) {
709 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
710 next_point = &(st->last_in_packet_buffer->next);
712 next_point = &s->internal->packet_buffer;
716 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
717 st->interleaver_chunk_size += pkt->size;
718 st->interleaver_chunk_duration += pkt->duration;
719 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
720 || (max && st->interleaver_chunk_duration > max)) {
721 st->interleaver_chunk_size = 0;
722 this_pktl->pkt.flags |= CHUNK_START;
723 if (max && st->interleaver_chunk_duration > max) {
724 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
725 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
727 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
729 st->interleaver_chunk_duration = 0;
733 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
736 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
738 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
739 || !compare(s, &(*next_point)->pkt, pkt)))
740 next_point = &(*next_point)->next;
744 next_point = &(s->internal->packet_buffer_end->next);
747 av_assert1(!*next_point);
749 s->internal->packet_buffer_end = this_pktl;
752 this_pktl->next = *next_point;
754 s->streams[pkt->stream_index]->last_in_packet_buffer =
755 *next_point = this_pktl;
760 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
763 AVStream *st = s->streams[pkt->stream_index];
764 AVStream *st2 = s->streams[next->stream_index];
765 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
767 if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
768 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
769 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
771 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
772 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
775 comp= (ts>ts2) - (ts<ts2);
779 return pkt->stream_index < next->stream_index;
783 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
784 AVPacket *pkt, int flush)
787 int stream_count = 0;
788 int noninterleaved_count = 0;
792 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
796 for (i = 0; i < s->nb_streams; i++) {
797 if (s->streams[i]->last_in_packet_buffer) {
799 } else if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
800 s->streams[i]->codec->codec_id != AV_CODEC_ID_VP8 &&
801 s->streams[i]->codec->codec_id != AV_CODEC_ID_VP9) {
802 ++noninterleaved_count;
806 if (s->internal->nb_interleaved_streams == stream_count)
809 if (s->max_interleave_delta > 0 &&
810 s->internal->packet_buffer &&
812 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
814 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
815 int64_t delta_dts = INT64_MIN;
816 int64_t top_dts = av_rescale_q(top_pkt->dts,
817 s->streams[top_pkt->stream_index]->time_base,
820 for (i = 0; i < s->nb_streams; i++) {
822 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
827 last_dts = av_rescale_q(last->pkt.dts,
828 s->streams[i]->time_base,
830 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
833 if (delta_dts > s->max_interleave_delta) {
834 av_log(s, AV_LOG_DEBUG,
835 "Delay between the first packet and last packet in the "
836 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
837 delta_dts, s->max_interleave_delta);
842 if (stream_count && flush) {
844 pktl = s->internal->packet_buffer;
846 st = s->streams[out->stream_index];
848 s->internal->packet_buffer = pktl->next;
849 if (!s->internal->packet_buffer)
850 s->internal->packet_buffer_end = NULL;
852 if (st->last_in_packet_buffer == pktl)
853 st->last_in_packet_buffer = NULL;
864 * Interleave an AVPacket correctly so it can be muxed.
865 * @param out the interleaved packet will be output here
866 * @param in the input packet
867 * @param flush 1 if no further packets are available as input and all
868 * remaining packets should be output
869 * @return 1 if a packet was output, 0 if no packet could be output,
870 * < 0 if an error occurred
872 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
874 if (s->oformat->interleave_packet) {
875 int ret = s->oformat->interleave_packet(s, out, in, flush);
880 return ff_interleave_packet_per_dts(s, out, in, flush);
883 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
887 ret = check_packet(s, pkt);
892 AVStream *st = s->streams[pkt->stream_index];
894 if (s->debug & FF_FDEBUG_TS)
895 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
896 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
898 if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
901 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
902 ret = AVERROR(EINVAL);
906 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
912 int ret = interleave_packet(s, &opkt, pkt, flush);
914 memset(pkt, 0, sizeof(*pkt));
918 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
921 ret = write_packet(s, &opkt);
923 s->streams[opkt.stream_index]->nb_frames++;
925 av_free_packet(&opkt);
929 if(s->pb && s->pb->error)
933 av_packet_unref(pkt);
937 int av_write_trailer(AVFormatContext *s)
943 ret = interleave_packet(s, &pkt, NULL, 1);
949 ret = write_packet(s, &pkt);
951 s->streams[pkt.stream_index]->nb_frames++;
953 av_free_packet(&pkt);
957 if(s->pb && s->pb->error)
962 if (s->oformat->write_trailer)
964 ret = s->oformat->write_trailer(s);
966 s->oformat->write_trailer(s);
972 ret = s->pb ? s->pb->error : 0;
973 for (i = 0; i < s->nb_streams; i++) {
974 av_freep(&s->streams[i]->priv_data);
975 av_freep(&s->streams[i]->index_entries);
977 if (s->oformat->priv_class)
978 av_opt_free(s->priv_data);
979 av_freep(&s->priv_data);
983 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
984 int64_t *dts, int64_t *wall)
986 if (!s->oformat || !s->oformat->get_output_timestamp)
987 return AVERROR(ENOSYS);
988 s->oformat->get_output_timestamp(s, stream, dts, wall);
992 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
993 AVFormatContext *src, int interleave)
999 local_pkt.stream_index = dst_stream;
1000 if (pkt->pts != AV_NOPTS_VALUE)
1001 local_pkt.pts = av_rescale_q(pkt->pts,
1002 src->streams[pkt->stream_index]->time_base,
1003 dst->streams[dst_stream]->time_base);
1004 if (pkt->dts != AV_NOPTS_VALUE)
1005 local_pkt.dts = av_rescale_q(pkt->dts,
1006 src->streams[pkt->stream_index]->time_base,
1007 dst->streams[dst_stream]->time_base);
1009 local_pkt.duration = av_rescale_q(pkt->duration,
1010 src->streams[pkt->stream_index]->time_base,
1011 dst->streams[dst_stream]->time_base);
1013 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1014 else ret = av_write_frame(dst, &local_pkt);
1015 pkt->buf = local_pkt.buf;
1016 pkt->destruct = local_pkt.destruct;
1020 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1021 AVFrame *frame, int interleaved)
1023 AVPacket pkt, *pktp;
1025 av_assert0(s->oformat);
1026 if (!s->oformat->write_uncoded_frame)
1027 return AVERROR(ENOSYS);
1033 av_init_packet(&pkt);
1034 pkt.data = (void *)frame;
1035 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1037 pkt.dts = frame->pts;
1038 pkt.duration = av_frame_get_pkt_duration(frame);
1039 pkt.stream_index = stream_index;
1040 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1043 return interleaved ? av_interleaved_write_frame(s, pktp) :
1044 av_write_frame(s, pktp);
1047 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1050 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1053 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1056 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1059 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1061 av_assert0(s->oformat);
1062 if (!s->oformat->write_uncoded_frame)
1063 return AVERROR(ENOSYS);
1064 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1065 AV_WRITE_UNCODED_FRAME_QUERY);